Bike shops, pawn shops and yard sales, eh? All good - but don't forget about auctions! Check the newspaper for municipal and police auctions. Often times there's TONS of bikes that sell super cheap! I bought an orange GT Performer last week for 28 bucks. It's all original and in pretty good shape...except for a hairline crack in one of the 3 spoke mags. I'm not sure what year it is, but it says "Made in USA" on it, so I'm guessing early 90's. I bought a cro-mo Mosh cruiser for 5 bucks at an auction last year. Bear in mind, most of what you'll see there is complete crap - rusty Next and Mongoose bikes. But there is an occasional treasure.